WATERTIGHT MEMBRANE, FILTRATION ELEMENT AND MEMBRANE APPARATUS Russian patent published in 2011 - IPC B01D71/02 B01D63/00 B01D63/08 

FIELD: process engineering.

SUBSTANCE: invention relates to membrane extraction of pure hydrogen from gas mixes containing hydrogen. Proposed watertight membrane is made from palladium alloy with raised outer surface with alternating ledges and recesses surrounding each said ledge. Palladium alloy comprises one or several elements from I^b, III, IV and VIII groups of periodic system, while maximum length L of arc on the surface of ledges in their cross section vs length of its projection onto area of base D varies from 1.05 to 1+δ, where δ stands for membrane alloy material plasticity. Invention covers also filtration element comprising claimed watertight membrane and membrane apparatus comprises claimed filtration element.

EFFECT: higher efficiency, longer life.

33 cl, 9 ex, 6 tbl, 14 dwg